DOI: 10.1007/s00382-013-1940-4
Scopus记录号: 2-s2.0-84886682362
论文题名: Large-scale atmospheric response to eastern Mediterranean summer-autumn SST anomalies and the associated regional impact
作者: García-Serrano J. ; Polo I. ; Rodríguez-Fonseca B. ; Losada T.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2013
卷: 41, 期: 2017-09-10 起始页码: 2251
结束页码: 2265
语种: 英语
英文摘要: Since the Mediterranean Sea is halfway between subtropical and middle latitudes, and it represents a marginal oceanic region, research has tended to focus on how large-scale modes of atmospheric variability modulate its surface temperature. Conversely, the present study examines the potential influence of the Mediterranean Sea surface temperature (SST) anomalies on the Northern Hemisphere atmospheric circulation. In particular, this work explores the large-scale changes in the global circulation forced/influenced by the eastern Mediterranean summer-autumn SST pattern. To isolate the atmospheric response, AGCM sensitivity experiments with prescribed SST over the Mediterranean Sea and climatology elsewhere are analysed. Observational diagnostics upon the period used to define the boundary conditions (1979-2002) are also interpreted. Our results support the hypothesis of an atmospheric pattern initiated in the Mediterranean basin, pointing out both a local baroclinic response and a barotropic circumglobal anomaly. This atmospheric teleconnection pattern projects onto a hemispheric wave-like structure, reflecting the waveguide effect of the westerly jets. Results suggest, thereby, that the recurrent summer-autumn circumglobal teleconnection pattern can be excited locally by changes in the atmosphere over the Mediterranean region. A linear behaviour is found upon a regional impact over northeastern Africa. The remote impacts present however a nonlinear signature: anomalous warm conditions influencing on northern Europe and Euro-Asia, whereas anomalous cold conditions impacting more on the North Pacific basin. Limitations in our model setup are also discussed. © 2013 Springer-Verlag Berlin Heidelberg. 资助项目: National Centre for Atmospheric Science
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/54740
Appears in Collections: 过去全球变化的重建
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作者单位: Institut Català de Ciències del Clima (IC3), Barcelona, Spain; Departamento de Geofísica y Meteorología, UCM, Madrid, Spain; NCAS-Climate, University of Reading, Reading, United Kingdom; Instituto de Geociencias (IGEO), UCM-CSIC, Madrid, Spain; Instituto de Ciencias Ambientales (ICAM), UCLM, Toledo, Spain
Recommended Citation:
García-Serrano J.,Polo I.,Rodríguez-Fonseca B.,et al. Large-scale atmospheric response to eastern Mediterranean summer-autumn SST anomalies and the associated regional impact[J]. Climate Dynamics,2013-01-01,41(2017-09-10)